Solve the simultaneous equations. xy = 4x + y = 5
2 answers:
Answer:
1,4
4,1
Step-by-step explanation:
y = 4/x
substitute
x + 4/x = 5
multiply the whole thing by x to make life easier
x^2 +4 = 5x
X^2 -5x +4 = 0
(x-1)(x-4)=0
x-1=0 x =1
x-4 =0. x=4
so there are 2 solutions
x=1. y = 4
x =4. y =1
Answer:
if X=1 ; Y=4
if X=4 ; Y=1
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